Radeon HD 7990 vs Radeon RX 5600

Intro

Compare those specs to the Radeon RX 5600, which uses a 7 nm design. AMD has clocked the core frequency at 1375 MHz. The GDDR6 memory works at a frequency of 1500 MHz on this particular card. It features 2048 SPUs along with 128 Texture Address Units and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 5600		150 Watts
Radeon HD 7990		375 Watts
	Difference: 225 Watts (150%)

Memory Bandwidth

In theory, the Radeon HD 7990 is 95% faster than the Radeon RX 5600 in general, due to its greater bandwidth. (explain)

Radeon HD 7990		576000 MB/sec
Radeon RX 5600		294912 MB/sec
	Difference: 281088 (95%)

Texel Rate

The Radeon HD 7990 will be much (approximately 38%) faster with regards to anisotropic filtering than the Radeon RX 5600. (explain)

Radeon HD 7990		243200 Mtexels/sec
Radeon RX 5600		176000 Mtexels/sec
	Difference: 67200 (38%)

Pixel Rate

The Radeon RX 5600 is much (more or less 45%) more effective at AA than the Radeon HD 7990, and also will be able to handle higher screen resolutions more effectively. (explain)

Radeon RX 5600		88000 Mpixels/sec
Radeon HD 7990		60800 Mpixels/sec
	Difference: 27200 (45%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.